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CN101581145B - Mechanical snap locking system for floor panels - Google Patents

Mechanical snap locking system for floor panels Download PDF

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Publication number
CN101581145B
CN101581145B CN200910142440XA CN200910142440A CN101581145B CN 101581145 B CN101581145 B CN 101581145B CN 200910142440X A CN200910142440X A CN 200910142440XA CN 200910142440 A CN200910142440 A CN 200910142440A CN 101581145 B CN101581145 B CN 101581145B
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China
Prior art keywords
panel
tongue
lock part
floor panel
edge
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CN200910142440XA
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CN101581145A (en
Inventor
D·佩尔万
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Valinge Innovation AB
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Valinge Innovation AB
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/02038—Flooring or floor layers composed of a number of similar elements characterised by tongue and groove connections between neighbouring flooring elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/023—Separate connecting devices for prefabricated floor-slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0889—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements characterised by the joints between neighbouring elements, e.g. with joint fillings or with tongue and groove connections
    • E04F13/0894—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements characterised by the joints between neighbouring elements, e.g. with joint fillings or with tongue and groove connections with tongue and groove connections
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/02005—Construction of joints, e.g. dividing strips
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/02005—Construction of joints, e.g. dividing strips
    • E04F15/02022—Construction of joints, e.g. dividing strips with means for aligning the outer surfaces of the flooring elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/10—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials
    • E04F15/105—Flooring or floor layers composed of a number of similar elements of other materials, e.g. fibrous or chipped materials, organic plastics, magnesite tiles, hardboard, or with a top layer of other materials of organic plastics with or without reinforcements or filling materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/0004—Joining sheets, plates or panels in abutting relationship
    • F16B5/0008—Joining sheets, plates or panels in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edge
    • F16B5/0012—Joining sheets, plates or panels in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edge a tongue on the edge of one sheet, plate or panel co-operating with a groove in the edge of another sheet, plate or panel
    • F16B5/0016—Joining sheets, plates or panels in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edge a tongue on the edge of one sheet, plate or panel co-operating with a groove in the edge of another sheet, plate or panel with snap action
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/04—Flooring or floor layers composed of a number of similar elements only of wood or with a top layer of wood, e.g. with wooden or metal connecting members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/01—Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0107—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges
    • E04F2201/0115—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edges with snap action of the edge connectors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/01—Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0138—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels perpendicular to the main plane
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/01—Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0138—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels perpendicular to the main plane
    • E04F2201/0146—Joining sheets, plates or panels with edges in abutting relationship by moving the sheets, plates or panels perpendicular to the main plane with snap action of the edge connectors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/01—Joining sheets, plates or panels with edges in abutting relationship
    • E04F2201/0153—Joining sheets, plates or panels with edges in abutting relationship by rotating the sheets, plates or panels around an axis which is parallel to the abutting edges, possibly combined with a sliding movement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/02—Non-undercut connections, e.g. tongue and groove connections
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/02—Non-undercut connections, e.g. tongue and groove connections
    • E04F2201/023—Non-undercut connections, e.g. tongue and groove connections with a continuous tongue or groove
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/05—Separate connectors or inserts, e.g. pegs, pins, keys or strips
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F2201/00—Joining sheets or plates or panels
    • E04F2201/05—Separate connectors or inserts, e.g. pegs, pins, keys or strips
    • E04F2201/0523—Separate tongues; Interlocking keys, e.g. joining mouldings of circular, square or rectangular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/38—Plastic latch parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/53—Mounting and attachment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/54—Flexible member is joint component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/16—Two dimensionally sectional layer
    • Y10T428/163—Next to unitary web or sheet of equal or greater extent
    • Y10T428/164—Continuous two dimensionally sectional layer
    • Y10T428/167—Cellulosic sections [e.g., parquet floor, etc.]

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Floor Finish (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Connection Of Plates (AREA)
  • Finishing Walls (AREA)
  • Lock And Its Accessories (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Floor panels (1, 1') are shown, which are provided with a mechanical snap locking system with a locking element (15) made of a separate material in order to reduce snapping resistance and/or increase locking strength. A method is provided to unlock mechanical locking systems horizontally.

Description

The mechanical locking system that is used for floor panel
The application is that application number is dividing an application of 200680010813.2 patent application, and the applying date of original application is on January 10th, 2006, and name is called " mechanical locking system that is used for floor panel ".
Technical field
The present invention relates generally to be used for the mechanical locking system field of floor panel and building panel, especially have the floor panel of mechanical locking system, this mechanical locking system can be by moving horizontally locking and taking apart.
Background technology
The present invention is particularly useful for by the floating floor that can form by the floor panel of locking system mechanical engagement, this locking system and this floor panel are one, promptly be installed together in factory, this floor panel comprises: the upper strata of being made up of one or more layers veneer, decorative laminate or ornamental plastic material; The intermediate core layer of making by wood fiber-based or plastic material; And the bottom balance layer that is preferably located in the sandwich layer back side.Therefore, the problem that prior art, known system is existed as non-limiting example and the description of purpose of the present invention and characteristics below, at first at this application, especially at the laminate flooring that is made of the rectangle floor panel with long limit and minor face, this floor panel all mechanically engages on long limit and minor face.Long limit and minor face mainly are to be used to simplify explanation of the present invention.Panel can be foursquare, perhaps can have more than four both not parallel each other also off plumb limits.
It is emphasized that the present invention can be applicable to any floor panel, can with the locking system combination of any known type, wherein, the floor panel utilization engages at the mechanical locking system that at least two adjacent edges are connected panel with vertical direction along level.Therefore, the present invention also can be applicable to, as wooden floor, the parquet floor on the top layer that has the sandwich layer made by timber or wood fiber-based, makes by timber or wooden plywood etc., have and printed and the floor on the surface crossed of varnish preferably, have the floor on the top layer of making by plastics or cork, malthoid, rubber etc.Even comprise floor, and has the floor that soft wearing layer for example sticks at the needle punched felt on the plate with crust such as stone material, ceramic tile etc.The present invention also can be used for building panel, and this building panel preferably comprises sheet material for example wallboard, ceiling, furniture parts etc.
Laminate flooring generally includes the thick fiberboard sandwich layer of 6-12mm, the bottom balance layer of being made by laminate, plastics, paper or similar material that upper decoration top layer of being made by laminate that 0.2-0.8mm is thick and 0.1-0.6mm are thick.Laminate surface comprises melamine impregnated paper.The most frequently used core material is the density height that is commonly referred to HDF (high density fiberboard), the fiberboard of good stability.Sometimes also use MDF (medium density fibreboard) as sandwich layer.
Traditional lamination floor panel of this type is connected with the tongue-and-groove joint by bonding joint tongue.
Except that above-mentioned traditional floor, floor panel has been developed to and has not needed to use adhesive but mechanically engage by so-called mechanical locking system.These systems comprise the locking device that locks panel horizontally and vertically.Usually process by the sandwich layer of counter plate and form mechanical locking system.Selectively, the parts of this locking system can be formed by independent material such as aluminium or HDF, and this independent material and floor panel are one, promptly just are bonded together when floor panel is made.
The main advantage of floating floor with mechanical locking system is to be easy to install.Also can easily pack up and reuse in different places on this floor.
The definition of some terms
Hereinafter, the visible surface that floor panel has been installed is called " front side ", and is called " rear side " towards the opposite flank of this floor panel of lower floor.Edge between front side and the rear side is called " trip edge "." horizontal plane or principal plane " is meant and is parallel to outside plane of extending, top layer.Two adjacent common " vertical plane (V) " that limit perpendicular to horizontal plane in direct juxtaposed top that close the edge of the floor panel of two joints." flatly " expression is parallel to horizontal plane, and " vertically " expression is parallel to vertical plane.
" locking system " is meant coefficient linkage, and this linkage vertically and/or flatly connects floor panel." mechanical locking system " is meant and do not use adhesive just can realize engaging (system).This mechanical locking system also can use adhesive bond under a lot of situations." with ... be integral " be meant and be integral with panel-shaped or in factory, link together with panel." clamping resistance " is meant when what need when moving horizontally two 100mm edges of two panels of locking is the power of unit with N." locking intensity " is meant and two 100mm edges of the panel of two lockings is taken apart fully or what need during at least separately greater than 0.2mm is the power of unit with N." the intensity clamping is than (SSR) " is meant that locking intensity is divided by the clamping resistance.
Prior art and problem thereof
(direction D1 carries out mechanical engagement on D2), has several method and locking system to use in vertical direction and horizontal direction will to grow limit and minor face.One of the most frequently used method is to rotate (angle)-clamping method, and one of the most frequently used locking system is a system of making one with sandwich layer.Install by rotating on long limit.Panel moves to latched position along long limit then.Minor face is by the horizontal clamping locking shown in Fig. 1 a-1c.Vertical connector is joint tongue 10 and tongue-and-groove 9.In the process of moving horizontally, have lath 6 bendings of Lock Part 8, when side edge is touched, strip springs back, Lock Part 8 enters lock slots 14 and flatly locks floor panel.In the clamping process, the bending of lath causes the vertical of Lock Part to move.The bending of lath has caused the vertical of Lock Part in the interlock process to move.Overcome frictional force between the long limit owing to need to use hammer and knock piece, and make lath crooked in the clamping process, it is complicated that therefore such clamping connects.Can reduce the frictional force between the long limit, and not tool using and mobile floor panel.Yet, especially forming in the locking system of one with the wood based sandwich layer, the clamping resistance is quite big.Wood based materials generally all is difficult to bending.In the clamping process, may produce the crack in the panel, Lock Part must be quite little so that clamping in vertical direction.The locking intensity of like this little Lock Part that is formed at one with sandwich layer is very low usually, and especially under drying condition, panel may slide separately.
Shown in Fig. 1 d-1f, the known card welding system can be provided with an independent plastic slat 6 ', and this plastic slat and panel are integral and have an elastic part.Compare with traditional integral type snap system, resistance was less when such locking system locked.Yet also there are several shortcomings in this locking system.The lath that plastic slat is used to replace joint tongue and has Lock Part.So the material cost height, and this locking system locking system common and old-fashioned panel is incompatible.Because Lock Part 8 ' must be arranged, tongue-and-groove 9 is difficult to processing.In fact, the locking on the along continuous straight runs must be used 4 Lock Parts, and wherein 2 flexible Lock Parts are arranged on the lath, and 2 (8,8 ') are on panel in addition.Be difficult to plastic slat is fixed on the length of whole minor face.This means that corner part does not have joint tongue, this will go wrong in some use occasion.
Shown in Fig. 1 g, it is also known that snap system can have the independent lath of being made by aluminium flake 6.Such locking system is highly susceptible to installing by rotating.Its major defect is that material cost is very high, especially when locking system locks by clamping.Its reason is that lath must be quite wide, to allow bending and clamping.
Summary of the invention
First primary and foremost purpose of the present invention provides a kind of mechanical locking system, and this mechanical locking system can be by horizontal clamping locking, and the clamping resistance is less than known prior art system, and preferably can reach quite high locking intensity.Compared to the prior art, the cost of this mechanical locking system and function are favourable.The major part of described primary and foremost purpose is to improve functions of components and the cost that locks in the horizontal direction in the mechanical locking system when the mutual push-tight of panel.
More specifically, described purpose provides a kind of mechanical snap locking system, wherein, can obtain one or several following advantage.
Preferably, move and the locking floor panel is only used very little power, in most preferred embodiment, do not need tool using, perhaps when tool using required percussion power when knocking piece and hammer very little so that in the routine installation, can not cause damage to the edge.
Lock function should be reliably, and vertical and horizontal lock should be firm, when humidity change or people walk on the floor, can prevent that the panel of two lockings from moving.
Locking system should be able to vertically lock floor panel with high accuracy, makes floor surface substantially at grade.
Locking system designs in such a way, and promptly material cost and cost of production are low.
Second purpose provides a kind of mechanical snap locking system, and this system can be compatible mutually with traditional mechanical locking system with sandwich layer formation one.If new panel can lock onto old panel, then is favourable.Like this, new locking system can not make the old increase in inventory extra cost of floor panel when coming into the market.
According to the mechanical locking system and the floor panel of independent claims, can all or part ofly reach above-mentioned purpose of the present invention.By independent claims and by manual and accompanying drawing, be readily appreciated that embodiments of the invention.
According to a first aspect of the invention, provide a kind of floor system, comprise a plurality of along a pair of adjacent edge floor panel of mechanical engagement mutually.Floor panel is provided with and its all-in-one-piece joint tongue and tongue-and-groove, and this joint tongue and tongue-and-groove are used for mechanically described a pair of neighboring edge being locked together perpendicular to the floor panel principal plane, forms vertical mechanical engagement like this between panel.Panel is provided with and its all-in-one-piece first Lock Part at one first edge, relatively and adjoining second edge be provided with lock slots, this lock slots to the bottom surface of panel or above opening.All be provided with second Lock Part on the every panel, lock slots is made and be connected to this second Lock Part by independent material.First and second Lock Parts form mechanical connection, and this mechanical connection is parallel to principal plane and perpendicular to ground, trip edge panel is flatly locked mutually.Second Lock Part is flexible and resilient, move in opposite directions by described two panel levels like this and make this two panel mechanical engagement, at least a portion of second Lock Part flexibly vertically moves at described second edge simultaneously, engage until the mutual level of the described neighboring edge of two panels, and second Lock Part in described second edge moves towards its initial position against first Lock Part in first edge.
Though it is favourable that flexible Lock Part and panel are arranged to one, the present invention does not get rid of the embodiment of flexible Lock Part as unitary part, and this unitary part was connected to panel by the installer before installing.
The present invention allows all lateral dominances of floor panel simply to move horizontally with the rotation on for example long limit, along long limit and the clamping of minor face and locking horizontally and vertically.In this preferred embodiment, flexible Lock Part is arranged on the minor face.This flexibility Lock Part also can be arranged on the long limit or be arranged on simultaneously on long limit and the minor face.
The present invention especially is fit to be applied to such floor panel, that is, for example not soft or strength deficiency is difficult to clamping to form firm clamping locking system to this floor panel owing to sandwich layer.The present invention is suitable for being wider than as plate the wide floor panel of 20cm equally, and wherein, the high clamping resistance of this floor panel in installation process is major defect, and the present invention also is suitable for being difficult to the panel that moves along joint in latched position.The panel that the parts of locking system are made by the material such as the timber of high frictional force and making have closely cooperate or very close to each other or or even the panel of the locking system of prestretched, all be difficult to move especially and move along its long limit.Especially the panel of prestretched is extremely difficult moves and clamping, and the locking bar of this panel presses together in the latched position bending and with panel.The locking system that reduces the clamping resistance will significantly reduce the set-up time of this class plate.
According to a second aspect of the invention, provide a floor system, comprise a plurality of can be along the floor panel of the mutual mechanical engagement of a pair of neighboring edge.Floor panel is provided with and its all-in-one-piece joint tongue and tongue-and-groove, with on perpendicular to panel principal plane direction with described a pair of neighboring edge mechanical caging together, thereby between panel, form vertical mechanical connection.
Panel is provided with and its all-in-one-piece first Lock Part at one first edge, and second Lock Part that is formed by independent material is connected to panel.
First and second Lock Parts form mechanical engagement, and this mechanical engagement is parallel to principal plane and perpendicular to ground, trip edge panel is flatly locked mutually.
Described two panels can move in opposite directions and mechanically engage by level, and first Lock Part and second Lock Part be at first vertically from moving simultaneously, and be vertically mobile in opposite directions then.
Second Lock Part be higher than by density first Lock Part material board-like material for example aluminium make, and have first and second the surface and the edge parts between the surface.This edge part forms at least a portion of second lock face, and this second lock face contacts with first lock face of first Lock Part and prevents that panel from flatly separating.
According to the present invention, the edge part of board-like material is used to form hard and sharp lock face, and this lock face forms powerful latching force against first lock face.Even the Lock Part of this point makes that lock face is very little and also can obtain very high locking intensity.In most of laminates and floor, sandwich layer and corresponding and panel-shaped all-in-one-piece first Lock Part is relatively softer, the cusp edge of aluminium sheet can be cut wood fiber and prevent edge separation as cutter.
Being used in combination of Lock Part with soft of point can be brought such advantage, promptly can use little lock face, and these little lock faces only need general tens millimeters little vertical moving can finish horizontal clamping.This means that bending and clamping resistance can significantly reduce, keep simultaneously or improve locking intensity.In the clamping process, if a part of comparing surface of aluminum plate with wood fiber material with low-frictional force as slide plane, then the clamping resistance can further reduce.
On the market there be and the relevant high clamping resistance of locking intensity the snap system of most one.Panel test sample with 100mm length of side has the locking intensity of clamping resistance and the 200-600N of 200-300N usually.---the intensity clamping is than (SSR)---changing between the 200/200=1 to 600/300=2 locking intensity divided by the clamping resistance.
The present invention for example can be reduced to the clamping resistance 100 even lower, and for example locking intensity can be provided to 1000 even higher.According to first and second aspects of the present invention, SSR is easy to reach 5-10.
According to a third aspect of the invention we, provide a kind of opposite with click action by moving horizontally the method for taking floor panel apart.Said method comprising the steps of: a) instrument is inserted the mechanical locking system with two Lock Parts, this mechanical locking system mechanically locks two adjacent edge edge of two panels in the horizontal direction; B) with this instrument two Lock Parts are vertically separated; C) make described limit flatly away from each other, to take mechanical locking system apart.
Usually move by rotation or along the edge and take the mechanical snap locking system apart.Yet for example the mounting means of fishbone does not allow to use such fractionation mode.Known can be by taking panel apart with perpendicular the moving horizontally in edge.Taking apart like this can only be used to lock the very low snap system of intensity.The invention enables the level of snap system to be taken apart and combine with high locking intensity.
Description of drawings
Fig. 1 a-1g illustrates prior art;
Fig. 2 a-2b illustrates two embodiment of first aspect present invention;
Fig. 3 a-3c illustrates mechanical engagement according to the floor panel of first aspect present invention with several steps;
Fig. 4 a-4d illustrates the mechanical caging of the floor panel of first and third aspect according to the present invention with several steps and takes apart;
Fig. 5 a-5c illustrates the mechanical caging of floor panel according to another embodiment of the present invention with several steps;
Fig. 6 a-6e illustrates embodiments of the invention;
Fig. 7 a-7h shows the different embodiment of flexible Lock Part;
Fig. 8 a-8c illustrates the locking system that is positioned at according to the present invention on long limit and the minor face;
How the locking system that Fig. 9 a-9i shows prior art changes into according to locking system of the present invention;
How Figure 10 a-10d illustrates flexible Lock Part as realizing flex tongue connected vertically;
Figure 11 a-11c illustrates mechanical caging according to the embodiment of second aspect present invention with several steps;
Figure 12 a-12j illustrates embodiments of the invention.
The specific embodiment
For the ease of understanding, schematically show several locking systems in the drawings.What should emphasize is that being used in combination of preferred embodiment can obtain improved with different functions.The inventor had tested all known locking systems, especially commercial locking system in all types of floor panels on the market, especially laminate and wood flooring, conclusion is all these known locking systems that have with the coefficient one or more Lock Parts of lock slots at least, be adjustable to have one or more according to the present invention the system of the Lock Part of the flexibility of first and second aspects and point.Major part among them can easily be adjusted to and native system compatibility.The Lock Part of several flexibilities and/or point can one on one or be arranged on abreast in two adjacent edges.Can be arranged on long limit and/or the minor face according to Lock Part of the present invention, have flexibility or point Lock Part one side can the another side of---preferably can by rotating or the vertical mobile locking system that locks---combines with having all known locking systems.The present invention does not get rid of flexible Lock Part and for example is positioned at floor panel on long limit and the minor face, does not get rid of to have for example panel on 6 limits or 8 limits of a plurality of limits yet.These panels can be installed by clamping-clamping mounting method.But most preferred embodiment is such floor board block, sandwich layer and locking system that this floor board block has the top layer of being made by laminate, made by HDF, this locking system has the flexible or sharp Lock Part that is positioned on the minor face and allows clamping easily, this Lock Part be positioned at long limit on also can be by twist-lock the mechanical locking system of one combine.Locking system on the long limit is in the little gap of at least some 0.01mm that can have an appointment between mobilizable surface in horizontal or vertical locking such as joint tongue/tongue-and-groove and Lock Part/lock slots.These little gaps help moving.Such floor is very easy to utilize rotation and clamping to install.
Can use wax or other chemical substances to reduce the slip resistance of long limit and/or minor face.The mechanical lapping of mach wood fiber or polishing can be used for reducing and the frictional force of for example rotating, slip is relevant with clamping equally.
It only is for example that angle, size, rounded portions are graded, and can regulate in principle of the present invention.
Below with reference to Fig. 2 a-2b, first preferred embodiment of the floor panel 1,1 ' that is provided with mechanical locking system of the present invention is described.
Fig. 2 a schematically shows the joint between the relative short edge trip edge 5b of the minor face trip edge 5a that is preferably placed at panel 1 and second panel 1 '.
The front side 61 of panel is positioned at a public horizontal H P substantially, and the top of trip edge 5a, 5b abuts against together in vertical plane VP mutually.Mechanical locking system locks together panel relative to one another on vertical direction D1 and horizontal direction D2.
For two trip edges are engaged on D1 and D2 direction, the edge of floor panel is provided with a locking bar 6 with first Lock Part 8 in a manner known way in a trip edge 5a, and with this panel all-in-one-piece tongue-and-groove 9, this trip edge is called the tongue-and-groove side hereinafter; And on opposite edges 5b, be provided with and panel all-in-one-piece joint tongue 10, this trip edge is called tongue side hereinafter.Joint tongue 10 and tongue-and-groove 9 provide vertically D1.
Mechanical locking system according to the present invention comprises independent flexibility second Lock Part 15, and this second Lock Part is connected to the lock slots 14 that is formed in the panel opposite edges 5b.In the embodiment shown in Fig. 2 a, lock slots 14 is formed at tongue side.The part of flexible Lock Part can be crooked along its length and can be moved in lock slots.The ledge P2 that flexible Lock Part 15 has the slot part P1 that is positioned at lock slots 14 and reaches lock slots 14 outsides.Be arranged in the ledge P2 and 8 actings in conjunction of first Lock Part of the second flexible Lock Part of being made by independent material a trip edge 15, this first Lock Part and panel are made one and are formed in another trip edge.
In this embodiment, panel 1 for example can have body or the sandwich layer of being made by a wood fiber-based such as HDF, veneer or solid wood 60.Panel 1,1 ' also can be made by stone material, metal or ceramic materials or similar rigid material.Above-mentioned material is not flexible, can not use the snap system of one.
The second flexible Lock Part can combine with tongue-and-groove 10 and/or the lath 6 with Lock Part 8, and this lath 6 can be the independent material that is connected on the panel.
Flexible Lock Part 15 has ledge P2, and this ledge P2 has circular outer 31 and forms the slide plane 32 on picture one inclined-plane in the present embodiment.
First Lock Part 8 has first lock face 20, second lock face, 22 actings in conjunction of this first lock face and the second flexible Lock Part 15, and along continuous straight runs D2 locking trip edge 5a, 5b.In this embodiment, lock face 20,22 is with respect to vertical plane VP slight inclination (A).Therefore, second Lock Part 15 locks as chock, and the vertical pre tension that can utilize the vertical DE by the second flexible Lock Part to produce is eliminated error.
Fig. 2 b illustrates another embodiment.The inside P1 of flexible Lock Part 15 is fixed in the lock slots 14, and ledge P2 can be vertically crooked to lock slots 14 and inner P1, and once more to the first Lock Part replication.In this embodiment, the bending of ledge P2 is carried out around central point CP.Lock face 20,22 is arranged to when ledge P2 returns its initial position formation clamping, and this lock face 20,22 contacts.
Fig. 3 a-3c illustrates flexible Lock Part 15 and how to move in lock slots 14.Shown in Fig. 3 a, when all-moving surface 32 pressed the oblique angle part of first Lock Part 8, flexible Lock Part 15 vertically moved.Shown in Fig. 3 c, when panel 1,1 ' top edge contact or during in predetermined latched position, this flexibility Lock Part 14 rebounds, and pins first Lock Part 8.
Fig. 4 a-4c illustrates the locking system with flexible Lock Part 15 and can and take apart by twist-lock.Fig. 4 d illustrates the locking system with flexible Lock Part 15 and can take apart by needle tool 16, and this needle tool 16 is inserted along the trip edge, so that flexible Lock Part 14 is pushed back, and takes mechanical locking system apart.Such instrument also can be used for taking apart locking system shown in Figure 12 b.In this embodiment, described instrument can insert the space 45 that for example is arranged in these Lock Part 8 tops, so that lath 6 is pushed back.Available several other method pushes back Lock Part, takes mechanical locking system apart with level.Shown in Fig. 4 d, for example can in border land separating tank 44 be set in the bottom of lath 6 and the lower vertical of Lock Part 15.When the panel that is mounted to pattern does not allow instrument when the edge inserts, such groove can be used for taking apart panel.Such fractionation mode can be used for taking apart the panel of installing with fish-bone pattern, wherein, to long limit long edge joint is bonded to minor face by minor face rotation and minor face clamping.Described fractionation mode also can be used for taking apart the panel with 6 limits or 8 limits, and wherein, one side of described panel or several lateral dominances connect with snap system of the present invention.
Fig. 5 a-5c illustrates the locking of Fig. 2 b illustrated embodiment.When slide plane 32 and Lock Part 8 contact,, then be favourable if the top 11 of joint tongue 10 is positioned partially in the tongue-and-groove 9.This helps the clamping and the installation of panel.
Fig. 6 a-6e illustrates different embodiments of the invention.Fig. 6 a illustrate have two joint tongues 10,10 ' and have towards the system of the lock slots 14 of front openings.Fig. 6 b illustrates the system that lock slots is arranged in tongue side and is positioned partially at joint tongue 10 parts in the vertical plane VP outside.Fig. 6 c, 6d and Fig. 6 a are similar, but these systems have only a joint tongue.Fig. 6 e illustrates the embodiment according to Fig. 2 b, but lock slots 14 is to front openings.In this embodiment, floor panel is the parquet floor with wooden top layer and veneer sandwich layer.This flexibility Lock Part 15 has projection 36, with frictional force that increases by 14 of flexible Lock Part 15 and lock slots and the mechanical engagement that helps flexible Lock Part and lock slots.
Preferably, flexible Lock Part 15 is connected to lock slots with high accuracy, especially in the locking process some parts of flexible Lock Part 15 in lock slots 14 when mobile.According to compressibility between flexible Lock Part and the lock slots and frictional force, the integral body of flexible Lock Part or different piece can connect into little gap with 0.01-0.10mm for example, accurately cooperate or prestretched with lock slots.Wax can be applied between lock slots and/or Lock Part or other can reduce the material or the chemical substance of frictional force.
Even have the gap, between upper joint edges, still can realize accurate cooperation.Ledge P2 can form on the lock face 20 that is pressed against Lock Part 8.For example, ledge P2 can form with vertical plane VP and have a little angle.The ledge P2 of flex tongue tilts, and the edge is pressed against together.Flexible Lock Part 15 can form in latched position and vertically produce permanent compression.This means that flexible Lock Part 15 just partly recoils to initial position.Alternatively, flexible Lock Part can be designed to have such size, that is, should slightly move to its initial position by the flexibility Lock Part after locking.Can progressively form perfect connection like this.
Fig. 7 a-7h illustrates the different embodiment of flexible Lock Part 15.In Fig. 7 a, flexible Lock Part 15 is molded as, and edge part ES is provided with friction connecting portion 36, and the shape of this friction connecting portion is made for example local pimple.If flexible Lock Part is engaged to floor panel in factory, then this friction connecting portion remains on flexible Lock Part in the lock slots 14 in installation process or in production, packing, transportation.In Fig. 7 b, flexible Lock Part 15 is plastic section of extruding.
Fig. 7 c illustrates the blank 50 that comprises by several flexible Lock Parts 15 connected to one another.In this embodiment, flexible Lock Part 15 utilizes and moldedly preferably utilizes injection moulding and make.
The resin material of any kind all can be used for producing flexible Lock Part, and described material is PA (nylon) for example, POM, PC, PP, PET or PE or similarly have material in character described in the above-mentioned different embodiment.These plastic materials can utilize for example glass fiber reinforcement.Preferable material is the PA that glass fiber is strengthened.
Fig. 7 d and 7e illustrate have length L, the flexible Lock Part 15 of stage casing MS and edge section ES.This flexibility Lock Part can be crooked in the longitudinal direction, if strong F acts on the ledge P2, then this ledge can vertically move in lock slots.Fig. 7 e illustrates double tongue 15.Fig. 7 g illustrates the extruding zone of rubber-like through the inside P1 of punching.Fig. 7 h is illustrated in the flex tongue 15 that has ledge P2 on the edge section ES.
Utilize these production methods and basic principle, bidimensional that can the various complexity of low-cost production or 3D shape (flexible Lock Part).Certainly, flexible Lock Part 15 available metals, preferably aluminium is made, wood based sheet material such as HDF and composite laminate also can be used for making flexible Lock Part, wherein, wood based sheet material is carried out machining and punching, and wood based sheet material is combined with for example elastic rubber material etc.
Fig. 8 a-8c illustrates flexible Lock Part 15 and how to be connected to groove 14 at the minor face 5a of floor panel.Fig. 8 a illustrates the embodiment with flex tongue shown in Fig. 7 b, and Fig. 8 b illustrates the embodiment according to Fig. 7 a.Fig. 8 c is illustrated in has flexible Lock Part on minor face 5a, the 5b, and has the floor panel of rotation system C, D on long limit 4a, 4b.Certainly, grow and also can have one or several flexible Lock Part on the limit.In this embodiment, the length L of flexible Lock Part 15 is shorter than the width FL of floor panel.Can should be mentioned that as non-limiting example the flexible Lock Part that has less than 0.8 times the length L of floor width FW can reach enough locking intensity.Even the length L of 0.5 times of FW also can reach enough intensity.The weight of flexible Lock Part like this is approximately 1 gram, and material cost can significantly be lower than the known technology that other use independent material.Because whether flexible Lock Part therefore is very easy to connect Lock Part with accurate unimportant apart from being connected (to panel) with corner part 23.Another advantage is that as in traditional floor panel, joint tongue 10 is along whole minor face extension basically.This especially provides firm vertical connection at corner part 23.Certainly, flexible Lock Part can cover whole width FL substantially.
Flexible Lock Part can be connected to lock slots with several method.Preferable methods is a fixing flexible Lock Part mechanically.Certainly also can use adhesive and mechanical device.For the ease of understanding, floor panel is positioned to thereafter on the side direction, and flexible Lock Part is on its minor face.Panel is also turning, makes the front side up.If flexible Lock Part is molded, then separate from blank 50, if extrude, then separate from roller.Then, when the minor face of panel was mobile under fixed cell, Lock Part 15 was pressed into or roller is gone into lock slots 14, and utilized frictional force to connect (to lock slots).Under the cardinal principle that flexible Lock Part is taken apart by frictional force or fixed, a lot of alternative methods are arranged.
Fig. 9 a to 9i illustrates all known systems, especially has the example of the legacy card welding system of flexible lath (9a-9c or 9g-9i) or flange 6 (9d-9f), and according to the present invention, these systems can be adjusted into the snap system with flexible Lock Part 14.Shown in Fig. 9 a and 9b, only need usually lock slots is simply adjusted.Such adjustment can and utilize the cutting tool of equal number to finish in identical machine.
Figure 10 a-10d is illustrated in the principle of using in the locking system with flexible Lock Part and also can be used for substituting joint tongue 10 with flex tongue 30, can be by the locking system of vertical (fold) locking that overlaps to provide.One panel 1 ' can vertically move to another panel 1 along vertical plane VP.In this case, flex tongue 30 can be according to moving horizontally with the described identical principle of the spendable embodiment of flexible Lock Part at flexible Lock Part.Certainly, flexible Lock Part can combine with flex tongue.This locking system can lock by rotation, clamping and vertical overlapping.Figure 10 d illustrates, if the flex tongue on the minor face 30 is arranged between the upper and lower of joint tongue 10 ' on the long limit and tongue-and-groove 9 ', then is favourable.This provides stronger locking at corner part.
In the present invention, there are a lot of selectable methods to realize utilizing the clamping of flexible Lock Part.All characteristics of the foregoing description can be bonded with each other or use separately.They can use on long limit and/or minor face.Even Lock Part is not flexible or can not moves in vertical direction, the method for producing the independent Lock Part 15 in the described insertion groove 14 of the foregoing description for example also can be used for improving frictional behaviour and intensity certainly.According to the present invention's second principle described below, for example can use inflexibility second Lock Part that can not in lock slots, move and can make by plastic material for example shown in Fig. 3 a.
This method and principle also can be used with flexible in the horizontal direction flex tongue 10 in locking process.Flexible Lock Part also can be used in combination with the lath 6 or the flange of part bending in the clamping process.This flexibility can be significantly less than the flexibility in the present known system.
This system can be used for being connected and installed in the tile shaped plate on the wall.Ceramic tile can interconnect and be connected to fixing Lock Part on the wall.
Figure 11 a-11c illustrates the mechanical snap locking system of second principle according to the present invention.This locking system has first Lock Part 8 that is integral and has first lock face 20 with panel, and second Lock Part of making by independent material 15, this second Lock Part is an aluminium sheet in this embodiment, this aluminium sheet has first surface 40, second surface 41 and marginal portion 42, and this marginal portion is second locking surface.The first softer locking surface 20 and hard and second locking surface, 42 actings in conjunction of point, and prevent that panel 1 and 1 ' is horizontally separated.Among this embodiment, second Lock Part 15 is in tongue side, and utilizes adhesive to be connected to the rear side of joint tongue 10, but this second Lock Part also can be mechanically connected to joint tongue.
As what non-limiting example can be mentioned be, the thickness T of aluminium sheet can be less than 1mm, 0.3-0.6mm preferably, and width W is less than 5mm.Preferably, width W should be less than the width W T of joint tongue 10, as 1-3mm.The locking surface of bracing can be less than 1mm.Preferably, they can arrive as 0.2-0.4mm for a short time.The flexibility that this means upper flange 43 and lath 6 can be as small as 0.1-0.2mm, even littler.This little flexibility will produce very low clamping resistance on wood based materials in the clamping process.
The balance layer 46 of locking lath 6 outsides 47 is removable, to avoid the bending relevant with humidity of lath 6, especially has in some floor panels in the locking system of little Lock Part, and this bending can cause some problems.
Figure 12 a-12b illustrates the locking snap system how the integral type snap system with high clamping resistance and low locking intensity is transformed into compatibility second principle according to the present invention.
Figure 12 c-12f illustrates the embodiment that second Lock Part 15 uses adhesive bond.Figure 12 d and 12f also illustrate first Lock Part can be very little or do not exist.Second locking surface of point will produce the incision power of similar blade edge on wood materials.The advantage of these embodiment is and since when top edge mutually near the time, second Lock Part 15 always is in the lock state, so Lock Part does not need accurate location.
In latched position, if there is the vertical pre tension that is formed by lath 6 and/or upper flange 43 between Lock Part, then locking intensity can significantly increase.
Figure 12 g-12j illustrates the embodiment that second Lock Part is mechanically connected to panel.These figure also illustrate first and second principles and can be used in combination.Second Lock Part 15 can not only have flexibility but also point, and can realize that intensity is high and clamping locking that the clamping resistance is little.All embodiment can be used on by in rotation and/or clamping or the vertical locking system that locks that overlaps.
Basically, all can be used as the Lock Part of independent material than the intensity height of the core material of floor panel or the material with differentiated friction character, to reduce the clamping resistance and/or improve locking intensity in mechanical locking system.The also available chemical substance dipping of wood based materials is to obtain similar advantage.

Claims (11)

  1. One group can be along the floor panel of the mutual mechanical connection of a pair of neighboring edge, each described floor panel comprises:
    Be positioned at the flex tongue on first edge of panel;
    Being positioned at being used on second opposite edges of panel admits the tongue-and-groove of the flex tongue of adjacent panels, so that perpendicular to the principal plane of these panels with described adjacent edge mechanical caging together, thereby forms vertical mechanical connection between these panels;
    Described tongue-and-groove is formed in the sandwich layer of panel;
    At the integrally formed Lock Part of described first edge and panel and at the lock slots at the described second opposite edges place, this lock slots is to the rear openings of panel;
    Described Lock Part forms horizontal mechanical with lock slots and is connected, so that be parallel to described principal plane and perpendicular to the first and second marginal water level lands that engage these panels locked mutually;
    Described flex tongue has resilience, is made by independent material, and cooperates with tongue-and-groove;
    Wherein, can make these two panel mechanical engagement together by vertically moving two panels in opposite directions, the described neighboring edge that at least a portion of while flex tongue flexibly moves horizontally up to these two panels vertically is bonded with each other, and flex tongue moves to initial position facing to tongue-and-groove then.
  2. 2. one group of floor panel as claimed in claim 1, it is characterized in that, described flex tongue has an interior section and the ledge in the lateral openings groove that is installed in first edge, wherein said interior section is fixed in the lateral openings groove, and the part of the resilient movement of described flex tongue is described ledge.
  3. 3. one group of floor panel as claimed in claim 1, it is characterized in that, described flex tongue has an interior section and a ledge that is elastically connected to a lateral openings groove in the edge, and described interior section carries out resilient movement along with moving of described ledge during the resilient movement of described flex tongue thus.
  4. 4. one group of floor panel as claimed in claim 2 is characterized in that, described ledge can be around the central point bending on the top that is positioned at described ledge.
  5. 5. one group of floor panel as claimed in claim 2, it is characterized in that, described ledge is included in first locking surface of the lower position of described ledge, described tongue-and-groove in second edge is included in second locking surface at the exterior section place, bottom of described tongue-and-groove, and described first and second locking surfaces are configured to cooperate to realize vertically.
  6. 6. one group of floor panel as claimed in claim 2 is characterized in that described ledge has the slide plane of downward extension.
  7. 7. one group of floor panel as claimed in claim 1 is characterized in that described flex tongue is made by polymeric material.
  8. 8. one group of floor panel as claimed in claim 1 is characterized in that, the polymeric material that described flex tongue is strengthened by glass fiber is molded or extrude and form.
  9. 9. one group of floor panel as claimed in claim 7 is characterized in that described polymeric material is a thermoplastic.
  10. 10. one group of floor panel as claimed in claim 8 is characterized in that described polymeric material is a thermoplastic.
  11. 11. one group of floor panel as claimed in claim 2 is characterized in that the interior section of described flex tongue has projection, to help the mechanical connection between flex tongue and the lateral openings groove.
CN200910142440XA 2005-03-30 2006-01-10 Mechanical snap locking system for floor panels Active CN101581145B (en)

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